Electrical transport effects due to oxygen content modifications in a Bi2Sr2CaCu2O8+δ superconducting whisker

被引：10
作者：
Cagliero, Stefano
Agostino, Angelo
Bonometti, Elisabetta
Truccato, Marco
机构：
[1] Univ Turin, Dipartimento Fis Sperimentale, Ctr Excellence, NIS, I-10125 Turin, Italy
[2] Univ Turin, CNISM, UdR, I-10125 Turin, Italy
[3] Univ Turin, Dipartimento Chim Gen & Organ, NIS, Ctr Excellence, I-10125 Turin, Italy
来源：
SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2007年 / 20卷 / 07期
关键词：
D O I：
10.1088/0953-2048/20/7/013
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We report a set of resistivity measurements along the alpha-axis of a Bi2Sr2CaCu2O8+delta microscopic superconducting whisker. The effect of the storage environment on sample ageing has been studied, considering both an air atmosphere at 273 K and a helium atmosphere at about 300 K for an overall storage time of about 100 days. It is clearly shown that the material underwent a remarkable resistivity increase of 26% at 260 K accompanied by a decrease in the critical temperature of 0.6 K during the whole ageing period. The helium atmosphere increased the average process rate by about two orders of magnitude. The present results are in agreement with previous findings on room temperature structural modifications in Bi2Sr2CaCu2O8+delta whiskers and can be ascribed to oxygen depletion phenomena from the material.
引用
收藏
页码：667 / 671
页数：5
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